package org.example.deadletter;

import com.rabbitmq.client.BuiltinExchangeType;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.DeliverCallback;
import org.example.utils.RabbitMqUtils;

import java.util.HashMap;
import java.util.Map;

/**
 * @author zfj
 * @date 2022/4/24 -20:45
 * 死信队列
 * 消费者1
 */
public class Consumer01 {
	//普通交换机名称
	private static final String NORMAL_EXCHANGE = "normal_exchange";
	//死信交换机名称
	private static final String DEAD_EXCHANGE = "dead_exchange";
	//声明普通队列
	private static final String NORMAL_QUEUE = "normal-queue";
	//声明死信队列
	private static final String DEAD_QUEUE = "dead-queue";

	public static void main(String[] args) throws Exception {
		Channel channel = RabbitMqUtils.getChannel();
		//声明死信和普通交换机 类型为 direct
		channel.exchangeDeclare(NORMAL_EXCHANGE, BuiltinExchangeType.DIRECT);
		channel.exchangeDeclare(DEAD_EXCHANGE, BuiltinExchangeType.DIRECT);
		//声明死信和普通队列
		Map<String, Object> arguments=new HashMap<>();
		//过期时间
		//arguments.put("x-message-ttl",10000);
		//正常队列设置过期之后的死信交换机
		arguments.put("x-dead-letter-exchange", DEAD_EXCHANGE);
		//正常队列设置死信 routing-key 参数 key 是固定值
		arguments.put("x-dead-letter-routing-key", "lisi");
		//设置正常队列最大长度
		//arguments.put("x-max-length",6);
		channel.queueDeclare(NORMAL_QUEUE,false,false,false,arguments);

		//声明死信队列
		channel.queueDeclare(DEAD_QUEUE,false,false,false,null);
		//绑定普通交换机队列
		channel.queueBind(NORMAL_QUEUE, NORMAL_EXCHANGE, "zhangsan");
		//绑定死信交换机队列
		channel.queueBind(DEAD_QUEUE, DEAD_EXCHANGE, "lisi");
		System.out.println("等待接收消息.....");
		DeliverCallback deliverCallback=(consumerTag,message)->{
			String msg = new String(message.getBody(), "UTF-8");
			if (msg.equals("info5")){
				System.out.println("Consumer01接收的消息是："+msg+"此消息被拒绝");
				//不放回队列  消息拒绝
				channel.basicReject(message.getEnvelope().getDeliveryTag(),false);
			}else {
				System.out.println("Consumer01接收的消息是："+msg);
				channel.basicAck(message.getEnvelope().getDeliveryTag(),false);
			}
		};
		//开启手动应答
		channel.basicConsume(NORMAL_QUEUE,false,deliverCallback,consumerTag->{});

	}
}
